To convert 40 degrees Celsius to Fahrenheit, you can use the formula: F = (C × 9/5) + 32.
Plugging in the numbers: F = (40 × 9/5) + 32.
First, multiply 40 by 9/5: 40 × 9/5 = 72.
Next, add 32: 72 + 32 = 104.
So, 40 degrees Celsius is equal to 104 degrees Fahrenheit.